1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Viktor [21]
3 years ago
8

An object begins with a speed of 20 meters per second and slows down to a speed of 10 meters per second over a time of 5 seconds

. Calculate the average speed of the object during these 5 seconds.
can someone tell me how to do this please?
Physics
1 answer:
Andreyy893 years ago
3 0

Answer:

V = 6 m/s

Explanation:

Given that,

Initial speed of an object is 20 m/s

Final speed of an object is 10 m/s

Time, t = 5 s

We need to find the average speed of the object during these 5 seconds. Let it is equal to V. Here, time is same. The average speed is given by :

V=\dfrac{x+y}{2}\\\\\text{Putting values}\\\\V=\dfrac{20+10}{5}\\\\V=6\ m/s

So, the average speed of the object is 6 m/s.

You might be interested in
The gravitational force between two objects has a magnitude of F. If both masses were doubled and the distance between them doub
Fofino [41]

Answer:

F' = F

Explanation:

The gravitational force of attraction between two objects can be given by Newton's Gravitational Law as follows:

F = \frac{Gm_1m_2}{r^2}

where,

F = Force of attraction

G = Universal gravitational costant

m₁ = mass of first object

m₂ = mass of second object

r = distance between objects

Now, if the masses and the distance between them is doubled:

F' = \frac{G(2m_1)(2m_2)}{(2r)^2}\\\\F' = \frac{Gm_1m_2}{r^2}

<u>F' = F</u>

7 0
3 years ago
A cat jumps from 2.5-meter-tall bookshelf to a 1.3-meter-tall countertop. If the cat
UkoKoshka [18]

The change in Potential energy of the cat is 176.4 J.

<h3 /><h3>Potential Energy:</h3>

This is the energy due to the position of a body. The S.I unit is Joules (J)

The formula for change in potential energy.

<h3 /><h3>Formula:</h3>
  • ΔP.E = mg(H-h).............. Equation 1

<h3>Where:</h3>
  • ΔP.E = Change in potential energy
  • m = mass of the cat
  • g = acceleration due to gravity
  • H = First height
  • h = second height.

From the question,

<h3>Given:</h3>
  • m = 15 kg
  • H = 2.5 m
  • h = 1.3 m
  • g = 9.8 m/s²

Substitute these values into equation 1

  • ΔP.E = 15×9.8(2.5-1.3)
  • ΔP.E = 15×9.8×1.2
  • ΔP.E = 176.4 J.

Hence, The change in Potential energy of the cat is 176.4 J

Learn more about Potential energy here: brainly.com/question/1242059

5 0
2 years ago
3. What type of scientific investigation would you use to view photosynthesis in a
Allushta [10]

Answer: f u

Explanation:

if mdldkdkdmdkdkekek

5 0
3 years ago
If τ=r×F then F.τ is equal
Mademuasel [1]
Yes that is correct.
4 0
3 years ago
Find the momentum of a train with a mass of 850 kg and forward velocity of 15 m/s
LenKa [72]

Answer:

12,750

Explanation:

P = mv

Momentum = Mass x Velocity

Plug it in and finish equation

7 0
3 years ago
Read 2 more answers
Other questions:
  • _____ energy powers the water cycle. Geothermal Solar Latent Electric
    7·2 answers
  • When large amplitude sound vibrates the ear significantly, a _______ results.
    8·2 answers
  • What must be applied to move a load?
    9·2 answers
  • A very large magnet applies a repulsive force to a smaller (0.05 Kg) magnet. If the smaller magnet accelerates across a friction
    13·1 answer
  • Elevator mass 750kg tension on cable 8950n what is the net force action on the elevator
    13·1 answer
  • Please I need with this
    14·1 answer
  • Plz help, its an emergency, giving lots of points for it. and srry if its in the wrong subject, not really sure? I just don't un
    13·2 answers
  • 11. (a)What downward force is acting on you when you go down a waterslide? (b)What type of friction is
    11·1 answer
  • Calculate the watts of power expended when a force 400 N travels 12 meters over 10 seconds.
    9·1 answer
  • Dr paivio studies the ways In which the endocrine system and the nervous system are similar.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!